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Cardiological interval data example.
data(Cardiological)
An object of class symbolic_tbl (inherits from tbl_df, tbl, data.frame) with 44 rows and 5 columns.
symbolic_tbl
tbl_df
tbl
data.frame
Billard L. and Diday E. (2006).Symbolic data analysis: Conceptual statistics and data mining. Wiley, Chichester.